I am a beginner with docker and I have read a lot but none of the writeups answered my below queries.
I installed docker on ArchLinux
#pacman -S docker
#systemctl start docker
and pulled ubuntu:16.04
#docker pull ubuntu:16.04
If from my main ArchLinix shell, I do a docker ps -a and use docker start and docker attach, is it the same docker shell as obtained using docker run -i -t <> /bin/bash ?
I am confused why are there so many methods to get a shell?
Or are they all different?
When I start this image, ps -a gave me 3 outputs:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
49c49a45c50c 0ef2e08ed3f3 “/bin/bash” 29 hours ago Up 29 hours youthful_euler
e1c05d3f6e67 0ef2e08ed3f3 “/bin/bash” 29 hours ago Exited (0) 29 hours ago serene_noether
3ace37908dad 0ef2e08ed3f3 “/bin/bash” 29 hours ago Exited (0) 29 hours ago fervent_curran
I am confused, why is this docker image running 3 instances of /bin/bash ?
What are these names youthful_euler, serene_noether, fervent_curran ??
I never specified them? Which CONTAINER ID do I need to attach myself to? This is crazy!!
I did apt-get update and apt-get upgrade but I cannot commit cause it says cannot move console to console-
Helpful replies appreciated.